feat: Initial commit of Yoto Up Covers web application

- Added main HTML file (index.html) for the web app interface.
- Created a sample cover template (sample_cover.html) for Yoto cards.
- Implemented a simple HTTP server (server.py) to serve the web app.
- Configured package.json for project metadata and scripts.

package.json

@@ -0,0 +1,35 @@
+{
+  "name": "yoto-up-covers-web",
+  "version": "1.0.0",
+  "description": "Standalone web application for creating Yoto card covers",
+  "main": "index.html",
+  "scripts": {
+    "start": "python3 server.py",
+    "serve": "python3 -m http.server 8000",
+    "build": "echo 'No build step required - this is a static web app'"
+  },
+  "keywords": [
+    "yoto",
+    "covers",
+    "cards",
+    "web-app",
+    "html",
+    "css",
+    "javascript"
+  ],
+  "author": "Yoto Up Team",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/xkjq/yoto-up"
+  },
+  "homepage": "https://github.com/xkjq/yoto-up",
+  "engines": {
+    "node": ">=14.0.0"
+  },
+  "browserslist": [
+    "last 2 versions",
+    "> 1%",
+    "not dead"
+  ]
+}